SANS ISC InfoSec Forums

One of our readers, Dalibor Cerar, sent us an email about an issue impacting Cisco...at this point. While its a hardware issue, the result if it occurs is a self inflicted Denial of Service. Cisco released a notice on February 2 that some of its products had an issue with the Clock Signal component manufactured by a supplier. This was discovered late in November 2016. According to Cisco:

"Although the Cisco products with this component are currently performing normally, we expect product failures to increase over the years, beginning after the unit has been in operation for approximately 18 months. Once the component has failed, the system will stop functioning, will not boot, and is not recoverable."

Keep in mind, Cisco says the component is used by other companies so I would expect to see this list grow to other vendors.

Here is the current list of the known Cisco/Meraki products and the link to their Field Notice:

Just thought I would add some comments from a case I opened with Cisco. Hopefully this is helpful to others using these routers. The routers ISR4331 that are affected with the faulty parts have a serial number lower than " xxx2049xxxx "